London 2012: Official Join in App
The Official Join in App for both the Olympic and Paralympic Games is as much about the city hosting it as the sports events themselves. So you not only get details of what is happening in the sporting arena but also of what is going on around it, including cultural events and city celebrations. You can find out which event is happening closest to your location, plan a way of getting there in double quick time, and even check out augmented reality views (just point your phone or tablet camera at a location to get information about it) of different locations. You can share details on your social networks, check out interactive maps, and also find out what’s happening at the Games, including the torch relays, the opening and closing ceremonies and the sport. Perfect if you happen to be in London. Not too bad even if you are in another country.
Available for: iOS, Android, BlackBerry

London 2012: Official Results App
If the Join In app is all about the Games and the city hosting them, the Official Results app is about the actual action. You launch the app, check the schedule and pick the sport that interests you, and not only will you get the latest updates from what’s happening in it, but also basic details of every athlete who is competing. You can also mark certain events as favourites and get reminders for them, and in a very neat touch, you can specify your nation (or any nation that you would like to track) and get the latest news on its progress at the Games. This is very much the app to have for those who cannot take their eyes off the medal tally.
Available for: iOS, Android, BlackBerry, Windows Phone